Eurasian Treecreeper (Certhia familiaris) Science Article 1 abstract Eurasian treecreepers, Certhia familiaris, exhibit an extremely low song variation, with particular males singing only a few variants of basically the same song type. However, males of this species are known to sing shortened and mixed song versions, which contain notes typical for the sibling short-toed treecreeper, […]
Category: Passeriformes
EXPLOITATION OF Erythrina dominguezii Hassl. (Fabaceae)NECTAR BY PERCHING BIRDS IN A DRY FOREST INWESTERN BRAZIL
Epaulet Oriole (Icterus cayanensis) Science Article 1 abstract Among the vertebrate pollinated plants, the genus Erythrina includes tree species in which birds arethe pollen vectors. Two groups in this genus may be distinguished: a) the hummingbird, and b) theperching bird pollinated species. Erythrina dominguezii is included in the second group and occursin deciduous/semi-deciduous forests in […]
Current status of the threatened Dupont’s lark Chersophilus duponti in Spain: overestimation, decline, and extinction of local populations
Duponts Lark (Chersophilus duponti) Science Article 2 abstract The European population of Dupont’s lark Chersophilus duponti, restricted to Spanish steppe, was estimated to be 13,000 pairs in c. 50 populations in 1988. There is, however, recent evidence that this number was overestimated because of the previous use of line transects for estimating population sizes. In […]
Habitat-suitability modelling to assess the effects of land-use changes on Dupont’s lark Chersophilus duponti: A case study in the Layna Important Bird Area
Duponts Lark (Chersophilus duponti) Science Article 1 abstract Habitat-suitability modelling is being increasingly used as a tool for conservation biology. Although studies at large spatial scales are more appropriate for reserve design and management, there is a scarcity of published work on local, high-resolution applications of such models. In this work we develop high-resolution habitat […]
Territory switching behavior in a sedentary tropical passerine, the dusky antbirds Cercomacra tyrannina
Dusky Antbird (Cercomacra tyrannina) Science Article 1 abstract Demographic data from an 8-year study of a marked population showed that switching territories and mates is common in both genders of dusky antbirds (Cercomacra tyrannina), a sedentary neotropical passerine with year-round territories and pairbonds. We conducted 22 experimental removals and followed six natural disappearances to examine […]
Polygyny in the dusky warbler, Phylloscopus fuscatus: theimportance of female qualities
Dusky Warbler (Phylloscopus fuscatus) Science Article 1 abstract The polygyny threshold model states that secondary females gain benefits from high territory quality thatoutweigh the costs of sharing a male. We aimed to test this prediction using the dusky warbler as a modelspecies. We first showed that neither the shifted sex ratio hypothesis nor the no-cost […]
WHY MATED DUSKYWARBLERS SING SO MUCH: TERRITORY GUARDING AND MALE QUALITY ANNOUNCEMENT
Dusky Warbler (Phylloscopus fuscatus) Science Article 2 abstract The fertility announcement hypothesis states that males sing most intensively during theperiod of female fertility in order to assure their paternity, as females would prefer to sexuallymate with males singing at a high rate. The dusky warbler (Phylloscopus fuscatus) is one ofthe species in which singing intensity […]
FORAGING BEHAVIOR, ECO-MORPHOLOGY, AND SYSTEMATICS OF SOME ANTSHRIKES (FORMICARIIDae: THAMNOMANES)
Dusky-throated Antshrike (Thamnomanes ardesiacus) Science Article 1 abstract The external morphology of a bird is a reflection of two factors: phylogeny and adaptations to the environment. Traditionally birds have been classified by systematists on the basis of similarities in morphology, especially at lower taxonomic ranks. Ecologists frequently study the same morphological characters used by systematists […]
A phylogenetic analysis of the evolution of moultstrategies in Western Palearctic warblers (Aves:Sylviidae)
Eastern Bonellis Warbler (Phylloscopus orientalis) Science Article 1 abstract Adult birds replace their flight feathers (moult) at least once per year, either in summer aftertermination of breeding or (in the case of some long-distance migratory species) in the winterquarters. We reconstructed the evolutionary pathways leading to summer and winter moultusing recently published molecular phylogenetic information […]
Wing moult of Eastern Olivaceous Warblers Hippolais pallida reiseri at stopover sites at the southern fringe of the Sahara
Eastern Olivaceous Warbler (Iduna pallida) Science Article 1 abstract Recent research on the systematics of the genus Hippolais led to the proposal to split Olivaceous Warbler Hippolais pallida into Western Olivaceous Warbler H opaca and Eastern Olivaceous Warbler H pallida with the subspecies pallida, elaeica, laeneni and reiseri. Here, we present data on postnuptial primary […]